Module: Topographic Indices
(c) 2003 by O.Conrad
Menu: Terrain Analysis > Hydrology > Catchment Area
Name | Type | Identifier | Description | Constraints |
---|---|---|---|---|
Input | ||||
Slope | Grid (input) | SLOPE | ||
Catchment Area | Grid (input) | AREA | ||
Transmissivity (*) | Grid (optional input) | TRANSMISS | ||
Output | ||||
Topographic Wetness Index (*) | Grid (optional output) | WETNESS | The Topographic Wetness Index: ln( Area / tan(Slope) ) | |
Stream Power Index (*) | Grid (optional output) | STREAMPOW | ||
LS-Factor (*) | Grid (optional output) | LSFACTOR | ||
Options | ||||
Method (LS) | Choice | LS_METHOD | Available Choices: [0] Moore et al. 1991 [1] Desmot & Govers 1996 [2] Boehner & Selige 2006 | |
Area to Length Conversion | Choice | LS_AREA | Derivation of slope lengths from catchment areas. These are rough approximations! Applies not to Desmot & Govers' method. | Available Choices: [0] 1 / cell size (specific catchment area) [1] square root (catchment length) |
Rill/Interrill Erosivity | Floating point | DG_EROSIVITY | Minimum: 0.000000 | |
Stability | Choice | DG_STABILITY | Available Choices: [0] stable [1] instable (thawing) |